CodePlex and SVN are quite old fashion. CodePlex is not very stable these days, so GitHub and Git might be a better option to host the code base. Of course, you can leave issue tracking/discussion/documentation here.

To avoid file missing and other similar issues, you might consider using AppVeyor. It is a quite convenient CI system free for open source projects.

Thanks for your suggestions.
I find GitHub harder to work with than SVN. On the minus side, Codeplex doesn't fully implement SVN, isn't very stable and can get very very slow. A lot of projects are migrating to GitHub and maybe MVVM FX will do it one of these days.